Cut-off mechanism for stripping machines



July 3l, 1928. 1,678,667

E. M. BRACKETT ET AL CUT-OFF MECHANISM FOR STRIPPING MACHINES Filed May20, 1926 2k Sheets-Sheet l H. vi

lNvi-:rgoR Edward/Vl faQ/telt and Pr/1% C/16M ATTONEY July 31, 192s.1,678,667

E. M. BRACKETT ET AL I CUT-OFF MECHANISM FOR STRIPPING MACHINES FiledMay 20, 1926 2 Sheets-Sheei 2 ,ff ,Apr l'" illllllllllu ATTORNEY y mdf?@V75/admit Patented July 31, 192s.

"UNITED- STATI-:s

v PATIENTf OFFICE.

EDWARD M. BRACKETT AND FRED M. BRACKETT, or '.roPEKA, KANSAS.

:CUT-Orr MncnAN-Isivr ron s'rmrPiNG ivrAcmimis.'

Application met rtray zo,

Our invention relates toa cut-oit mechanism for stripping machines andmore particularly to new.4 and improved operating means therefor. Y

Itis a purpose of our inventionto provide new and improved driving meansfor a cutof Ymechanism for ystripping machines,

whereby the'v proper cutting action, is obtained and to provide new andimproved stopl mechanism `for holding; the cutting blade'frommoving'into cutting position until the article that is being stripped isinV proper position for the sameto be severed. t

'More' particularly our inventionA comprises newY and improveddriving'mechanism that is simplevin construction and compact, and `thatcan be readily: -adjustedto place strip engaging the 'the cuttingedge ofthe cuttingvmechanism in proper'posit'ioni'to v'cut the strip at theproper point and to provide gravity operated stop mechanism forthecuttingmeans 'to'. hold vthe same out of vcutting position until-thearticle is in proper position for severing thek strip secured thereto.-Other objects and advantages of thein- Vvention will be apparent as'thedescription off the accompanying drawings proceeds.

Howevcn' vwe desire to have it distinctly understood that we do notintend toy limit ourselves to the exact details shown or described, butthat we intend to includeas part of ourv inventionv all such obviouschanges and modiiicationsotl parts as would occur to a person skilled inthis art and as 'would fall within the scope of the claims.

In the drawings: A

Fig. 1 is a fragmentary perspective View of a. stripping machine showingour improved cutting-otf mechanism'.

Fig. 2 is a longitudinal section thereof.I

Fig. 3 is a section taken on the line 3-3 0fFig.2. v`

Fig. 4 isa perspective vview of the cutter Aactuating mechanism*7showing 'the parts thereof separated.

Figa 5 is a fragmentary prespective viewof the rotary cutter carryingmember and associated parts, separated.

l f fragmentary perspective view of the adjusting means for the cuttermem'- ber in -assembled relation. i l

1926. jfserriai N6. 1110.578.

f i reiste? i 7 is a similar view of the sleeve with which the adjustingmeans engages.'

F ig; 8 is a perspective view ofthe` adjusting means. j j j 'Fig 9 is afragmentary'v sectional view of the stop mechanism.

.Figg'lO is a 'perspective'view of the gravity operated stop member,rand y t l Fig. 11 is 'a-perspective View of the presser member." y

' "Referring in detail'to the drawings Our improved cut-oit mechanismismount- "edupon' a k'stripping machine having'the Ylongitudinallyextending frame members `1'() Vand 11 andthe bearing members 12 mount-'edin any suitablefjmanner upon Athe'framej work: of' the machine.lJournalled inthe Vre1at`ive'thereto-AMount-ed upon the rotat-v ableVmember 17 is the knite'18r which is provided with abevelled cuttingedge I19.`- The blade 18 is secured to a block 20 by means oit the plate21 andl the securing members 22, the block 20 being provided with hingeears 23 lthrough which the pivot 'pin 241 passes, said pivot pin alsopassing through the ears 25yprovided on the member 17.A The blade 18 islnormally 'heldin' position extending` at right angles to the Aaxisfofthe shaft by means ofthe'spring 2 6, oneend 427 of which engages. withtheplate 21 vand the otheruend 28 'of whichl engages with the ymember17.

The 'rotatable member 17 is provided with a transverse opening 29therein `into which the pin 30l is driven with thel end 31 thereofprojecting outwardly therefrom. VThe end 31 of the pin 30 engages withone endof'a coil spring 32 which is'mounted in a groove 33 in a secondrotatable member 34' which is also free torotate on the shaft v13. ATheopposite end of the'spring 32 engages with an inwardly extending pin orprojection on the member'34 so that relative rotation looY of the member'34 to the member 17 will compress the spring 32. The member 34 may beprovided with a suitable oil passage 36A if desired. The member 34 isfurther provided with a reduced threaded portion 38 which is slotted ata plurality of points as indicated at 39. The reduced threaded portion38 is in the form of an annular flange, thus providing a recess withinthe member 34 which recess extends further'- niore into the main portionof the member 34 as indicated at 40.

Pinned or otherwise fixed on the shaft 13 to rotate therewith is asleeve member 41, the same being shown as'being secured to the shaft bymeans of the pin 42. The sleeve member 41 is provided with a flange 43at one en d thereof and a groove 44 near the other end thereof. Theflange 43 vis of such a size as to fit within the bore provided withinthe threaded portion 38 of the member 34 and the recess -40 and aring-like member 45 of friction producing material such as leather orsimilar fibrous material, is mounted within the recess 40 between theflange 43 and themember 34. A disk-like member or flat ring 46 ismounted on the sleeve'41 so as to embrace the same and is free tosliderthereon, said member having outwardly extending lugs 47 that areadapt'- ed to' slide in the slots 39 to guide said member 46. Mountedbetween the flat ring 46 and the flange 43 is a friction producing ring48 which is made of the samevmaterial and substantially in the samemanner as the member 45.

Screw threadedly engaging with the threaded portion 38 of the member34is a hollow cap-like member 49 which isV provided with an inwardlyextending flange 50 that has an yope-ning therein of sufficient size topass over the sleeve 41 and mounted within the member 49 andengaging'against the flange 50 and against the flat ring-like member 46is a coiled compression spring 51. It will be seen that by rotating themember 49 the tension of the spring 51 can be varied, thus varying thepressure exerted by the members 34and 46 upon the friction members 45and 48 which are vcompressed between the flange 43, the member 34 andthe disklike member 46. 1 The member 49 is provided with a knurledportion 52 to facilitate turning thereof and a member 53 havingscrew-threaded engagement with the member 49 is provided for holding theparts in adjusted position, said member having a reduced end portion 54which isV adapted to enter one of the slots 39 to hold the cap member 49from turning relative to the member34.

One of the bearing members 12 is provided with an extension orenlargement 55 having a-transverse opening therein through which a pin56 provided on the adjusting member 57 extends, the adjusting member 57lbeing a yoke-like member having a substantially U-shaped opening 58therein and khaving a reduced flange portion 59 following substantiallythe contour of the opening 58 and providing a recess 60 of substantiallythe same shape as theopening 58 butslightly larger than said opening.The flange 59 seats in the groove 44 in sleeve 41 and the shoulderformed due to the enlarged recess `60 engages with the flange 61 formedon the end of the sleeve 41 due to the provision of the groove 44. Thepin 56 is provided with The adjusting n shaft 13Iis moved lengthwise inits bearings by'movement ofthe member56 which, due

to engagement of the flange 59 in the groove 44, moves the sleeve41 andthus the shaft 13 along with the same. After the blade 18 has beenplaced in -its Vproper position the set screw 63 is tightenedtoyholdvthe same in `adjusted position and a collar 64 on the shaft 13is-,moved along the shaft to engagement with the carrier 17 and lockedto the shaft by a set screw 4.65. The collar 64.v having been movedalong the shaft into enf gagement with the member 17 and theiset screw65 having been brought into engagement withthe shaft 13 to hold thecollar in position, the cutting blade 18 will beplaced and held in itsproper positionv relative to the work bythe adjustment described above.While a separation of the sprocket wheel 14 from the collar 64may occurdue to such adjustment, this is immaterial, the sprocket wheel adjustingitself to its proper position along the shaft due to the fact that themember 16 is slidingly engaged vin the key way 66.

. The articles to be operated on are moved along by the conveyor belts67 and 68, one of which is below the article and one above the article,the article being indicated by the numeral 69 and being shown as being abook-like member to which the binding strip 70 has been'applied aroundone edge thereof. In order to sever the strip 70 at the proper point itis desired to obtain a Y quick cutting action of the blade 18 which issubstantially instantaneous. In order to obtain such an action the stopmember-71 is provided which has the bearing portions 72 provided thereonthrough which the shaft 73 extends, said shaft 73 being mount ed in theframe member 1() and the dependl ing .ear 74 providedon the table 75.The stop member 71 is provided with an extenride up on the same.

sion 76 which underlies the member` 17 and in which is mounted anupwardly projecting stop lug 77 which. ispreferably made of hardenedmaterial. and which -is held in place by means of the set scre'w'78. Astop finger 79 is mounted in a groove 80in fthe member 17 and held inplace luy/means of the fasteningv member 81, said stop linger 79engaging with the stop lug 77 vas shown in Fig. 9 when the book 69 is'in the-position shown in Fig. 1. When the book 69 is in such positionthe same' is in engagement with the upwardly projecting ribs or fingers82 on the plate 83 which is secured to the crank extension 84 on thestop member 71.

Furthermore, when the book 69 is inthe position'shown in Fig. 1,'theresilient presser member 85 is in engagement therewith, said pressermember being providedV with the tines or fingers 86 which Voverlie theribs 82. The presser member 85'is mounted on the fiat arm 87 ofthe leverv'88. kThe lever 88 is pivotally mounted upontheear 90 provided on thebracket 91, the ear 90'being offset from the base portion of the member91, which is secured to t-he frame member 11. rlhe lever 88 furthermorehas an arm 92, and a tension spring 93 has one end thereof hookedthrough an eye in the arm 92 and the other end thereof'hooked through aneye in the base of the bracketA 91, the

spring 93 normally exerting a tension on'the arm of the lever 92so as tohold the presser member 85 in engagement with the book or other article69 passing under the same and holding the same firmly in engagement withthe ribs 82 on the plate 83. When the book or other article is inengagement Awith the member 83 the crank arm 84 on-the member 71f ispushed downwardly, tlius moving the extension 76 of the stop member 71upwardly with the stop lug 77 in'position to'be` engaged by the stopfinger 79. However, after the book or other article is carriedbeyond theribs r82, the excess weight of th'e'extension 76 overbalances the'member 71 so that the crank arm 84 moves upwardlyand the extension 76downwardly, thus moving the stop lug'77 out of engagement with the stopnger 79, whereupon the-spring 32 which has been previously compressed,causesthe blade 18l to quickly cut'through the` binding material 70. Theribs 82 are preferably provided with bevelled faces*` 94 to cause thearticlessuch as books 69 to morereadily The quick cutting actionoftheblade 18 is obtained due to the fact that the spring 32 is undercompressionwhen the stop lugl77 moves out of engagement-with the finger79. The spring is placed under compression du'e to the fact that themember 1,7 is held from rotation while the member 34 is rotated due tothe frictional engagement of the members 45 and 48 with the members 34and 46.

After the spring has been substantially comvpletely compressed, thefriction of the members-45 and 48will be overcome and the rotation ofthe member 34 will'cease, the sleeve 41 and theflange thereon continuingto rotate while the members 34 and 46 are'stationary. Upon release ofthe finger 79"the member 17 is swung around quickly due to thecompression of the spring 32, and rotation of the member 34 with themember 41 is resumed due tothe frictional engagement yof the members'45and 48l withthe .adjoining parts. This continues until the spring 32 isagain tensioned, thisv occuring. when the member 79 will again be inengagement with the stop lug 77. Should thel member 17 make more thanone revolution before the stop'linger 79 again engages 'with the lug 77this will'not injure the book or other article 69`in anyway, as thespring hinge l so mentioned member and said shaft comprisingv a flangedsleeve on said shaft, friction means between the flange on said' sleeveand said' last vmentioned member, andy -resilient means for yieldinglylurging said ,sleeve and said last mentioned member into engagement withsaid friction-means.' f I lv 2. In a machine of the character described,a rotatable member,a cutter mounted thereon, 'a shaft, ja memberyieldingly connected with said rotatable member and vfriction drivingmeans betweensaid last mentoned member and said shaft comprising afianget sleeve on said shaft, friction means between the flange on saidsleeve and said last menitioned member, a disk embracing said sleeve andslid'ablykeyed to said last mentioned me1`nber,friction means between'said flange and -said disk and-mean's forv urging said disk and saidlastmentioned member toward sai'dffiangeinto engagement withfsaid fricarotatable member, a cutter mounted thereon, ashaft, a. member yieldinglyconnected with 'said' rotatable member 'and friction drivingmeansfbetween said last mentionedmember and said shaft comprisingafianged sleeve on'said shaft,`l friction means between the-flangeonsaid sleeve and said last mentioned member, a disk embracing saidsleeve and slidably keyed to said last mentioned member, frictionmeans!between said flange and said disk and aspring embracing said slee-ve andengaging means on saidlast menmember andsaidy shaft comprising a.flanged sleeve on saidlshaft', friction means between the flange onlsaidy sleeve and said lastrmentioned member, resilient means foryieldingly urging; said sleeve and said last mentioned member-.intoengagement with said vfriction means, andmeans for adjusting the tensionofi said resilient'11n-2ans.-

5.v Inamachine of the character described, arotatable membe-r, a. cuttermounted thereon,.a shaft, a. member yieldingly connected With said.rotatable member and friction driving means bet-Ween said last mentionedmember and said shaft comprising-a flanged sleeve on said shaft, aninvardly flanged collar mounted on said lastmentioned member vandembracing 'said'y sleeve, a disk embraoingsaid sleeve and slidably keyedto saidlast mentioned member, friction means between the'flangefon saidsleeve and said disk and said' last vmentioned member and resilientmeans mounted between theV flange on said collar and. said disk.

6. In a machine of the character described, a rotatable member, a cuttermounted thereon, a shaft, a member yieldingly-connectcd with said'rotatable member andk friction driving means between said last mentionedmember and said shaft comprising a. anged sleeve on said shaft, aninwardlyv flanged colla-r mounted on said lastmentioned member andembracing said sleeve, a disk embracing said sleeve andv slidably vkeyedto said last mentioned member, friction means Ybetvveen the flange onsaid sleeve and said ber relativelyl to the Work comprising a membersecured in fixed positionfon said shaft' and connected With saidncuttcrmem-- ber and adjustable mea-ns on one 'of said bearings enga-ging saidlast mentioned' member to move said shaft axially inits bear-` ings.

8. In a machine of the Vcharacter dej scribed, .bearingy members,l ashafti mounted thereon and means for adjusting said cutter membervrelatively to the Work comprisingV a member secured in fixedpositionon: said shaft, means on said cutter member and said last mentionedmember for holding said members from relative axial movement on saidshaft, said last mentioned member having a groovctherein, an adjustingmember engagingv in said groove and adjust-ably mounted relative to oneofv said bearings, and means for clamping said adjusting member inadjusted position. 10. In a machine of thev characterv described, adriving shaft, la carrier freely rotatable on the shaft, a driver havingslip connection with the sha-ft, yielding connection between' thecarrier and the driver, a stop on the carrier, a rocking stop memberadapted for engagement by the stop o-n the carrier and movable byygravity to non-functional position, and a cutter mounted onrthe carrier.Y f, l1. In a machineof -the character described, a driving shaft, acarrier freely rotatable on the shaft, al driver having slip connectionWith the shaft, yielding connection between the carrier and-the driver,a stop on'thc carrier, a rocking stop member adapted for engagement bythe stop-.on the carrier andmovableby gravity to non-'funtionalposition, and a cutter hingedly mounted on the carrierand'yieldinglylurged'lto functional position. i l.

'12. In' a machine of the character described,` a. driving shaft, acarrier axially mounted on the shaft, adriving'memberon and havingslipconnection `with the shaft, yielding connection bet-Weenthe carrierv andioo the driving member, a stop on thecarrier, a`

stop member movable into position for engagement by the stopA onthezcarrier, acutter hingedly mounted on the carrier, .and aspringurging the cutter to functional position.

scribed, a rotatablepshaft, a ,carrier loosely mounted on 'the shaft,anV annular member loosely mounted on the shaft having a spring grooveat one side anda slotted extension at its opposite side, asleeve xed toythe shaftand having an annular flange, a ring .13. In a machineof .thecharacter de-y Level-66'? loose on the sieeve having lugs seated in theslots of said annular member, frictional means interposed between thering and flange, a spring in said spring' groove, means for anchoringone end of the spring, means on the carrier engaging the opposite end ofthe spring, a sto-p on said carrier, a gravity stop engageable With thestop on said earrier to resist travel of the carrier against tension ofsaid spring, and a cutter mounted 10 on the carrier and yieldinglyretained in functional position. V

In testimony whereof We ax' our signatures. Y Y EDWARD M. BRACKETT. FREDM. BRACKETT.

